Effect of transformation twins on the anelastic behavior of polycrystalline Ca1-xSrxTiO3 and SrxBa1-xSnO3 perovskite in relation to the seismic properties of Earth's mantle perovskite

M. Daraktchiev; R. J. Harrison; E. H. Mountstevens; S. A.T. Redfern

doi:10.1016/j.msea.2006.01.141

Effect of transformation twins on the anelastic behavior of polycrystalline Ca_1-xSr_xTiO₃ and Sr_xBa_1-xSnO₃ perovskite in relation to the seismic properties of Earth's mantle perovskite

M. Daraktchiev^*, R. J. Harrison, E. H. Mountstevens, S. A.T. Redfern

^*Corresponding author for this work

University of Cambridge

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

The mechanical loss of Ca_1-xSr_xTiO₃ as a function of temperature has been studied up to 1000 °C using dynamical mechanical analysis. The loss spectrum reveals a relaxation peak in the tetragonal phase and negligible mechanical loss in the cubic and orthorhombic phases. The peak is accompanied by a softening of the storage modulus, caused by the formation of mobile transformation twin domain walls. The small value of internal friction in the orthorhombic phase is associated with a negative volume strain, resulting in domain walls that are strongly pinned by lattice defects. The volume changes and mechanical loss in Ca_1-xSr_xTiO₃ are compared with those in Sr_xBa_1-xSnO₃, a system which shows a positive volume strain. In contrast to Ca_1-xSr_xTiO₃, Sr_xBa_1-xSnO₃ displays a thermally activated peak in the orthorhombic phase. A frequency-independent peak attributed to the tetragonal-orthorhombic transition is also seen. The positive volume strain in Sr_xBa_1-xSnO₃ results in domain wall structures that are less strongly pinned by lattice defects.

Original language	English
Pages (from-to)	199-203
Number of pages	5
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	442
Issue number	1-2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.msea.2006.01.141
Publication status	Published - Dec 20 2006
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

Domain wall thickness
Elastic softening
Ferroelastic phase transitions
Internal friction
Negative/positive volume strain

Access to Document

10.1016/j.msea.2006.01.141

Cite this

Daraktchiev, M., Harrison, R. J., Mountstevens, E. H., & Redfern, S. A. T. (2006). Effect of transformation twins on the anelastic behavior of polycrystalline Ca_1-xSr_xTiO₃ and Sr_xBa_1-xSnO₃ perovskite in relation to the seismic properties of Earth's mantle perovskite. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 442(1-2 SPEC. ISS.), 199-203. https://doi.org/10.1016/j.msea.2006.01.141

Daraktchiev, M. ; Harrison, R. J. ; Mountstevens, E. H. et al. / Effect of transformation twins on the anelastic behavior of polycrystalline Ca_1-xSr_xTiO₃ and Sr_xBa_1-xSnO₃ perovskite in relation to the seismic properties of Earth's mantle perovskite. In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. 2006 ; Vol. 442, No. 1-2 SPEC. ISS. pp. 199-203.

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abstract = "The mechanical loss of Ca1-xSrxTiO3 as a function of temperature has been studied up to 1000 °C using dynamical mechanical analysis. The loss spectrum reveals a relaxation peak in the tetragonal phase and negligible mechanical loss in the cubic and orthorhombic phases. The peak is accompanied by a softening of the storage modulus, caused by the formation of mobile transformation twin domain walls. The small value of internal friction in the orthorhombic phase is associated with a negative volume strain, resulting in domain walls that are strongly pinned by lattice defects. The volume changes and mechanical loss in Ca1-xSrxTiO3 are compared with those in SrxBa1-xSnO3, a system which shows a positive volume strain. In contrast to Ca1-xSrxTiO3, SrxBa1-xSnO3 displays a thermally activated peak in the orthorhombic phase. A frequency-independent peak attributed to the tetragonal-orthorhombic transition is also seen. The positive volume strain in SrxBa1-xSnO3 results in domain wall structures that are less strongly pinned by lattice defects.",

keywords = "Domain wall thickness, Elastic softening, Ferroelastic phase transitions, Internal friction, Negative/positive volume strain",

author = "M. Daraktchiev and Harrison, {R. J.} and Mountstevens, {E. H.} and Redfern, {S. A.T.}",

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Daraktchiev, M, Harrison, RJ, Mountstevens, EH & Redfern, SAT 2006, 'Effect of transformation twins on the anelastic behavior of polycrystalline Ca_1-xSr_xTiO₃ and Sr_xBa_1-xSnO₃ perovskite in relation to the seismic properties of Earth's mantle perovskite', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 442, no. 1-2 SPEC. ISS., pp. 199-203. https://doi.org/10.1016/j.msea.2006.01.141

Effect of transformation twins on the anelastic behavior of polycrystalline Ca_1-xSr_xTiO₃ and Sr_xBa_1-xSnO₃ perovskite in relation to the seismic properties of Earth's mantle perovskite. / Daraktchiev, M.; Harrison, R. J.; Mountstevens, E. H. et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 442, No. 1-2 SPEC. ISS., 20.12.2006, p. 199-203.

Research output: Contribution to journal › Article › peer-review

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T1 - Effect of transformation twins on the anelastic behavior of polycrystalline Ca1-xSrxTiO3 and SrxBa1-xSnO3 perovskite in relation to the seismic properties of Earth's mantle perovskite

AU - Daraktchiev, M.

AU - Harrison, R. J.

AU - Mountstevens, E. H.

AU - Redfern, S. A.T.

PY - 2006/12/20

Y1 - 2006/12/20

N2 - The mechanical loss of Ca1-xSrxTiO3 as a function of temperature has been studied up to 1000 °C using dynamical mechanical analysis. The loss spectrum reveals a relaxation peak in the tetragonal phase and negligible mechanical loss in the cubic and orthorhombic phases. The peak is accompanied by a softening of the storage modulus, caused by the formation of mobile transformation twin domain walls. The small value of internal friction in the orthorhombic phase is associated with a negative volume strain, resulting in domain walls that are strongly pinned by lattice defects. The volume changes and mechanical loss in Ca1-xSrxTiO3 are compared with those in SrxBa1-xSnO3, a system which shows a positive volume strain. In contrast to Ca1-xSrxTiO3, SrxBa1-xSnO3 displays a thermally activated peak in the orthorhombic phase. A frequency-independent peak attributed to the tetragonal-orthorhombic transition is also seen. The positive volume strain in SrxBa1-xSnO3 results in domain wall structures that are less strongly pinned by lattice defects.

AB - The mechanical loss of Ca1-xSrxTiO3 as a function of temperature has been studied up to 1000 °C using dynamical mechanical analysis. The loss spectrum reveals a relaxation peak in the tetragonal phase and negligible mechanical loss in the cubic and orthorhombic phases. The peak is accompanied by a softening of the storage modulus, caused by the formation of mobile transformation twin domain walls. The small value of internal friction in the orthorhombic phase is associated with a negative volume strain, resulting in domain walls that are strongly pinned by lattice defects. The volume changes and mechanical loss in Ca1-xSrxTiO3 are compared with those in SrxBa1-xSnO3, a system which shows a positive volume strain. In contrast to Ca1-xSrxTiO3, SrxBa1-xSnO3 displays a thermally activated peak in the orthorhombic phase. A frequency-independent peak attributed to the tetragonal-orthorhombic transition is also seen. The positive volume strain in SrxBa1-xSnO3 results in domain wall structures that are less strongly pinned by lattice defects.

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KW - Ferroelastic phase transitions

KW - Internal friction

KW - Negative/positive volume strain

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Daraktchiev M, Harrison RJ, Mountstevens EH, Redfern SAT. Effect of transformation twins on the anelastic behavior of polycrystalline Ca_1-xSr_xTiO₃ and Sr_xBa_1-xSnO₃ perovskite in relation to the seismic properties of Earth's mantle perovskite. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. 2006 Dec 20;442(1-2 SPEC. ISS.):199-203. doi: 10.1016/j.msea.2006.01.141